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982c775fd213d51c9399773c1c4ea82b | 103 831 | 1 Scope | The present document provides the specification of the Release 2 DEN service. More specifically, the present document specifies the syntax and semantics of the "Decentralized Environmental Notification Message" (DENM) and the DENM protocol handling. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 2 References | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 2.1 Normative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which a... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 2.2 Informative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks i... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 3 Definition of terms, symbols and abbreviations | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 3.1 Terms | For the purposes of the present document, the terms given in ETSI TS 103 301 [i.7], ETSI TS 103 902 [i.5] and the following apply: actionId: identifier of a detected event À La Carte container: container of DENM that includes information of the detected event in addition to management container, situation container and... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 3.2 Symbols | For the purposes of the present document, the following symbols apply: actionId Identifier of an event that is detected by an ITS-S appDENM_trigger Application request type to generate a new DENM for a newly detected event appDENM_update Application request type to generate an update DENM for an update of the event app... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 3.3 Abbreviations | For the purposes of the present document, the abbreviations given in ETSI TR 103 902 [i.5] and the following apply: EEBL Electronic Emergency Break Light KAF Keep Alive Forwarding RCC Road Configuration Container RMI Resource Management Information NOTE: Where an abbreviation defined in ETSI TR 103 902 [i.5] has multip... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 4 DEN service introduction | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 4.1 Background | The Decentralized Environmental Notification (DEN) service is an application support functionality operating at the facilities layer. The DEN service is responsible for the generation of DEN Messages (DENMs) based on received triggering information from applications. It is also responsible for the processing of receive... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 4.2 Services provided by the DEN service | The DEN service provides functionalities to application entities. At the originating ITS-S, an ITS-S application may trigger, update and terminate the transmission of DENMs. At the receiving ITS-S, the DEN service processes received DENMs and makes the information available for usage by ITS-S applications. Optionally, ... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5 DEN service functional specification | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.1 DEN service in the ITS station reference architecture | The DEN service is a facilities layer entity that implements the DENM protocol. It interfaces with ITS-S applications in order to receive the application request for DENM transmission and to provide the received DENM content to the ITS-S applications. Furthermore, the DEN service may interact with other facilities laye... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.2 DEN service functional architecture | The DEN service shall provide the following sub-functions: • Encode DENM: This function defines the actual content of the DENM based on input from the ITS-S applications and encodes a DENM according to the format specified in Annex A of the present document. • Decode DENM: This function decodes a received DENM. ETSI ET... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3 Interfaces of the DEN service | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.1 Interfaces to the ITS-S applications | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.1.1 Introduction | An ITS-S application can request the generation of different types of DENM as specified in clause 4.2, according to pre-defined conditions, for example as specified in the C2C-CC Basic System Profile [i.2] and the C-Roads Release [i.4]. The DEN service provides interfaces to ITS-S applications for the processing of the... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.1.2 Data passed for the request type AppDENM_trigger | For the application request type AppDENM_trigger, Table 2 presents data being exchanged via the interface IF.Triggering. Table 2: Data passed via the interface IF.Triggering for AppDENM_trigger Category Data Definition (see note 9) Remarks Data passed from ITS-S application to DEN service actionId {DENM.denm.management... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.1.3 Data passed for the request type AppDENM_update | For the application request type AppDENM_update, Table 3 defines data being exchanged via the interface IF.Triggering. Table 3: Data passed via the interface IF.Triggering for AppDENM_update Category Data Definition (see note 7) Remarks Data passed from application to DEN service actionId or other applicable identifier... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.1.4 Data passed for the request type AppDENM_termination | For the application request type AppDENM_termination, Table 4 defines data being exchanged via the interface IF.Triggering. Table 4: Data passed via the interface IF.Triggering for AppDENM_termination Category Data Definition (see note 7) Remarks Data passed from application to DEN service actionId or other applicable ... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.1.5 Data passed for received DENM | The list of data passed via the interface IF.DataCollect from the DEN service may vary depending to the ITS application needs. Alternatively, ITS-S applications may receive DENM information via the LDM database as described in clause 5.2. Table 5 provides an example of data passed via IF.DataCollect. ETSI ETSI TS 103 8... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.2 Interface to management plane entities | The DEN service may exchange information with the entity(ies) in the ITS management plane via the interface IF.Control (Figure 3). NOTE: The specifications of the interface between the DEN service and the management entity are out of scope of the present document. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.3 Interface to the security plane entities | In case ETSI ITS security [6] at the facilities layer is used, the DEN service exchanges information directly with the entity(ies) in the security plane via the interface IF.Security (Figure 3). NOTE: The specifications of the interface between the DEN service and the security entity are out of scope of the present doc... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 5.3.4 Interfaces Data In and Out | The DEN service shall pass the DENM for dissemination via the IF_DataOut to either another facilities layer entity such as Resource Management or a lower layer functionality such as the Networking & Transport layer as specified in Table 6. The DEN service shall gather DENM via the IF_DataIn from either another facility... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6 DENM dissemination requirements | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1 DENM dissemination concepts | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.1 Event identification | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.1.1 actionId | The event identification is enabled by the component actionId. Each time a new DENM is generated upon an application request, a new actionId value shall be assigned. The actionId shall be the combination of an ITS-S identifier and a sequence number. The ITS-S identifier corresponds to stationId of the originating ITS-S... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.1.2 stationId update and actionId management | ITS stations that are part of an ecosystem which use the trust model according to ETSI TS 102 940 [7] and ITS certificates according to ETSI TS 103 097 [6] and that are of type [Itss_WithPrivacy] as defined in ETSI TS 102 940 [7] shall implement functionalities that assigns temporal stationIds (pseudonyms) to be used a... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.2 Trigger, update, repetition and termination of DENM | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.2.1 DENM trigger | DENM trigger refers to the process of the generation and transmission of a DENM when the DEN service of the originating ITS-S receives an application request with the type AppDENM_trigger. A new DENM shall be generated. For DENM trigger, an unused actionId value shall be created by the DEN service. The DEN service may ... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.2.2 DENM update | The originating ITS-S may detect the evolution of an event some time after the DENM trigger. The ITS-S application provides the update information to the DEN service using the application request AppDENM_update. The DEN service shall then generate an update DENM. This process is denoted as DENM update. The parameter re... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.2.3 DENM repetition | In between two consequent DENM updates, a DENM may be repeated by the DEN service of the originating ITS-S at a pre-defined repetition interval, in order that new ITS-Ss entering the destination area during the event validity duration may also receive the DENM. This process is referred to as DENM repetition. The DENM r... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.2.4 DENM termination | The DENM termination indicates the end of the detected event. A DENM termination is either a cancelation or a negation. Cancellation DENM can only be transmitted by the originating ITS-S that originally requested the DENM trigger. Negation DENM can be transmitted by other ITS-Ss: • DENM termination by the originating I... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.3 Geographic location information | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.3.1 Awareness area | Depending on the use case as identified by the event type, the awareness area is defined by the ITS-S application of the originating ITS-S. The provided information shall be included in the DENM as made available to the DEN service. A receiving ITS-S may make use of the awareness area information in order to prepare fo... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.3.2 Relevance zone | Alternatively to the awareness area, and depending on the use case as identified by the event type, the relevance zone is defined by the ITS-S application of the originating ITS-S. The provided information shall be included in the DENM as made available to the DEN service. The eventType component implicitly indicates i... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.3.3 Detection zone | Complementary to the awareness area / relevance zone, a DENM provides detection zone information. A receiving ITS-S may compare its own trajectory with the detection zone information in order to detect the entering into an awareness area / a relevance zone. If the Location container is present, the component detectionZ... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.3.4 Destination area | The destination area is used by the ITS networking & transport layer for the DENM transmission. According to ETSI TS 103 899 [2], three geometric shapes are defined, each shape being represented by the combination of one or several geographical point and distance information: • circular shape; ETSI ETSI TS 103 831 V2.3... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.4 DENM forwarding | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.4.1 Packet centric forwarding | DENM forwarding may be realized by the ITS networking & transport layer or the facilities layer. The packet centric forwarding function refers to the ITS networking & transport layer functionality that forwards a DENM from the originating ITS-S to the destination area. NOTE: The specification of this function is out of... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.1.4.2 Keep-alive forwarding | The Keep-Alive Forwarding (KAF) functionality is optional for the DEN service. The KAF refers to the ITS facilities layer forwarding scheme, represented as a sub-function of DEN service in Figure 3. The main objective of KAF is to store a received DENM in the DEN service and to forward it to other ITS-Ss when necessary... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.2 DENM dissemination constraints | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.2.1 General confidence constraints | Special data confidence constraints may apply to some data provided in the DENM, depending on the detection capabilities of the ITS-S, such as position accuracy constraint, time accuracy constraint and event detection quality constraint. These confidence constraints are presented in the data element and data frame defi... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.2.2 General security constraints | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.2.2.1 Introduction | Clause 6.2.2 is applicable to ITS stations that are part of an ecosystem that uses the trust model according to ETSI TS 102 940 [7] and ITS certificates according to ETSI TS 103 097 [6]. The security mechanisms for ITS consider the authentication of messages transferred between ITS-Ss with certificates. A certificate i... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.2.2.2 Service Specific Permissions (SSP) | DENMs shall be signed using private keys associated to Authorization Tickets of type explicit that contain a pair of: ITS-AID associated to the DEN service as specified in ETSI TS 102 965 [1] and SSPs of type BitmapSsp, as specified in ETSI TS 103 097 [6]. The BitmapSsp for DENMs shall conform to the DENM SSP octet sch... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 6.2.3 General priority constraints | The DENM priority is defined by the related use case specified in the C2C-CC Basic System Profile [i.2] and the C-Roads Release [i.4]. Priority information is provided in the PCI across the OSI layers and/or transmitted by lower layers as specified as Traffic Class. Therefore, it is not included in a DENM. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7 DENM specification | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.1 DENM structure | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.1.1 General structure of a DENM | A DENM is a PDU composed of a common ITS PDU header and multiple containers, which constitutes the DENM payload. The component header contains the ITS PDU header and is common header that includes the information of the protocol version, the message type and the stationId of the originating ITS-S. The component denmPay... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.1.2 ITS PDU header | The ITS PDU header shall be as specified in ETSI TS 102 894-2 [3] and as constraint in Annex A. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.1.3 DENM Management container | The Management container shall include the components: actionId, detectionTime, referenceTime, eventPosition, validityDuration and stationType and may include the components termination, awarenessDistance, trafficDirection and transmissionInterval: • actionId: This component shall be used as defined in clause 6.1.1 and... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.1.4 DENM Situation container | The Situation container includes information that describes the detected event. It shall include the components: informationQuality and eventType, and may include the components linkedCause, eventZone, linkedDenms eventEnd, eventEndFactor and perceivedEvent as follows: • informationQuality: This component shall be used... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.1.5 DENM Location container | The Location container describes the location of the detected event. It shall include detectionZonesToEventPosition and may include eventSpeed, eventPositionHeading, roadType, lanePositions, occupiedLanes, linkedIvims, linkedMapem, detectionZonesToSpecifiedEventPoint and predictedPaths as follows: • eventSpeed: This co... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.1.6 DENM À La Carte container | The À La Carte container contains additional information that is not provided by other containers. This container provides the possibility for ITS-S application to include application specific data in a DENM. All information included in the À La Carte container is optional. It shall be present when the data is provided... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 7.2 DENM format specification | The DENM syntax and semantics shall be as specified in ASN.1 in Annex A of the present document. DEs and DFs that are not defined in the present document shall be imported from the common data dictionary ETSI TS 102 894-2 [3] as specified in Annex A Detailed specifications of all components of DENM are provided in the ... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8 Protocol operation of the DEN service | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.1 Introduction | This clause specifies the protocol operations of the DEN service for three main roles: • originating ITS-S operation (clause 8.2); • forwarding ITS-S operation (clause 8.3); and • receiving ITS-S operation (clause 8.4). The specification of the protocol operation is organized in three parts: 1) Protocol data setting ru... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2 Originating ITS-S operation | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.1 Protocol data setting rules | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.1.1 General requirements | The data setting for the originating ITS-S operation shall be as specified in Annex A and shall follow the rules defined in this clause. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.1.2 actionId | For the application request type AppDENM_trigger, actionId shall be assigned as defined in clause 6.1.1.1. ETSI ETSI TS 103 831 V2.3.1 (2025-11) 38 For the application request type AppDENM_update, the application may pass actionId to the DEN service in the application request. For update DENM, the actionId shall remain... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.1.3 referenceTime | For the application request type AppDENM_trigger, the referenceTime shall be set to the time at which the new DENM is generated by the DEN service. For the application request type AppDENM_update, the referenceTime shall be set to the time at which update DENM is generated by the DEN service for each update. For the ap... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.1.4 termination | For the application request type AppDENM_trigger, the termination component shall not be included in DENM. For the application request type AppDENM_update, the termination component may be present, depending on the DENM type for which the update is requested by the ITS-S application. For the application request type Ap... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.1.5 T_O_Validity, T_RepetitionDuration and T_Repetition | The timer T_O_Validity is the time that indicates the end of the DENM validity for the originating ITS-S protocol operation. Its expiration time shall be set to: • the offset of the validityDuration starting from the detectionTime, if the validityDuration is provided by the application; • the default offset of 600 s st... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.1.6 Originating ITS-S message table | The DEN service shall maintain at least all data as defined in the present clause in the originating ITS-S message table. At a point in time, any DENM entry in the originating ITS-S message table may be associated with one of three states: • ACTIVE state: The termination data is not set for DENM entry of the actionId. ... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.2 General protocol operation | Upon reception of a request from ITS-S application via the interface IF.Triggering, the DEN service shall execute the following operations: For application request type appDENM_trigger: 1) Calculate expiration time for timer T_O_Validity (clause 8.2.1.5): a) If expiration time of timer T_O_Validity is in the past, send... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.3 Exception handling | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.3.1 General requirements | The originating ITS-S shall apply the exception handling rules specified in this clause. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.3.2 DENM generation exception | If the DEN service cannot generate a DENM successfully, the DEN service shall send a failure notification to the ITS-S application. NOTE 1: This exception is valid for all application request types. NOTE 2: The failure of the DENM generation may happen, if the DEN service was not able to collect all required data for t... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.3.3 actionId non-existence exception | This exception applies to the application request types AppDENM_update and AppDENM_termination. For the application request type AppDENM_update, if the corresponding actionId does not exist in the originating ITS-S message table, the DEN service shall send a failure notification to the ITS-S application. For the applic... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.2.3.4 Time operation exception | If the expiration time of the timer T_O_Validity lies in the past when the application request is processed, the DEN service shall send a failure notification to the ITS-S application. NOTE: This may happen, if the DEN service is not able to process the application request in time, due to the processing delay of the IT... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3 Forwarding ITS-S operation | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.1 Introduction | The following clauses describe the protocol operation of a one possible KAF protocol as introduced in clause 6.1.4.2. The KAF is a sub-function of the DEN service that forwards a received DENM from the facilities layer to the ITS networking & transport layer when necessary. This sub-function is optional. It may be deac... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2 Protocol data setting rules | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2.1 General requirements | The data setting for the forwarding ITS-S operation shall be as specified in Annex A and shall follow the rules defined in this clause. ETSI ETSI TS 103 831 V2.3.1 (2025-11) 48 |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2.2 actionId | The forwarding ITS-S shall not set the actionId. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2.3 referenceTime | The forwarding ITS-S shall not set the referenceTime. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2.4 termination | The forwarding ITS-S shall not set the termination. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2.5 T_F_Validity and T_Forwarding | The timer T_F_Validity schedules the end of the DENM validity for the KAF protocol operation. Its expiration time shall be set to: • the offset of the validityDuration starting from the detectionTime, if the validityDuration is included in the received DENM; • an invalid value, if the validityDuration is not included i... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2.6 Forwarding ITS-S message table | The DEN service shall maintain a forwarding ITS-S message table. This message table shall at least store the DENMs for which the KAF is activated. The forwarding ITS-S message table shall store the received DENM payload. The update of the forwarding ITS-S message table shall follow the rules as defined in the receiving... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.2.7 DENM regeneration | When a DENM is being forwarded, the DEN service shall regenerate the DENM before forwarding it to the ITS networking & transport layer. For this regeneration, the management container, situation container, location container and À La Carte container of the DENM shall not be modified. The ITS PDU header shall be replace... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.3 General protocol operation | Upon reception of a DENM with an actionId for which the KAF is activated, the DEN service shall execute the following operations: 1) Check if the termination exists in received DENM: a) If yes, continue the operation. b) Otherwise, omit execution of further steps. 2) Check if the referenceTime of the received DENM is e... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.4 Exception handling | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.4.1 General requirements | The forwarding ITS-S shall apply the exception handling rule specified in this clause. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.3.4.2 DENM generation exception | If the DEN service cannot generate a DENM successfully, the DEN service shall stop executing further operations of the forwarding. NOTE: The failure of the DENM regeneration may happen, if the DEN service was not able to collect all required data for the DENM regeneration, or the collected data are not compliant to the... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4 Receiving ITS-S operation | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.1 Protocol data setting rules | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.1.1 General requirements | The data setting for the receiving ITS-S operation shall be as specified in Annex A and may follow the rules defined in this clause. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.1.2 actionId | The receiving ITS-S shall not set the actionId. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.1.3 referenceTime | The receiving ITS-S shall not set the referenceTime. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.1.4 termination | The receiving ITS-S shall not set the termination. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.1.5 T_R_Validity | T_R_Validity is the time that indicates the end of DENM validity. It is used in the receiving ITS-S message table for keeping up-to-date DENM information. Its expiration time may be set to: • the offset of the validityDuration starting from the detectionTime, if the validityDuration is present in the received DENM; • t... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.1.6 Receiving ITS-S message table | The DEN service may maintain an ITS-S message table with at least the following data for the receiving protocol operation: • actionId: actionId value of the received DENMs until the T_R_Validity is expired. • referenceTime: The value of the referenceTime refers to the most recent value of received DENMs of the same act... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.2 General protocol operation | Upon reception of a DENM, the DEN service may execute the following operations: 1) Decode DENM; Calculate expiration time for timer T_R_Validity (clause 8.4.1.5): a) If expiration time is in the past, discard the received DENM and omit execution of further steps. b) Otherwise, continue the operation. 2) Lookup entries ... |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.3 Exception handling | |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.3.1 General requirements | The receiving ITS-S may apply the exception handling rules specified in this clause. |
982c775fd213d51c9399773c1c4ea82b | 103 831 | 8.4.3.2 DENM decoding exception | If the received DENM cannot be decoded by the DEN service, the operation may stop, and the received DENMs may be discarded. ETSI ETSI TS 103 831 V2.3.1 (2025-11) 56 Annex A (normative): ASN.1 module This clause provides the normative ASN.1 module containing the syntactical specification of the DENM PDU, its containers,... |
2b19cd9d2873d1be8003ecd211dcf476 | 103 828 | 1 Scope | The present document provides a recap of the priority gaps concerning the modelling of complex DTs by exclusively using the SAREF ontology suite. Then, it is discussed how such gaps may be filled through the extension of the SAREF suite in two different directions (ETSI TS 103 264 [1]), i.e. the modelling of semantic s... |
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